Question

help me in calc

Answer 1

@Vocaloid @Hero

Answer 2

@Vocaloid @Hero

Answer 3

@Ultrilliam

Answer 4

Can’t you try plugging in the numbers?

Answer 5

calc is not exactly all plugging in numbers

Answer 6

I'll see if voca can help don't want to have a wrong answer even if I tried plugging them in

Answer 7

my calc is super rusty but for the first one I believe you would calculate how much the function changes over the interval and then divide by the size of the interval

so basically d(1) - d(1/2) / (1 - 1/2)

Answer 8

I don't think the derivative would work b/c that gives instantaneous rate of change

Answer 9

is it b or c
I'm confused lol

Answer 10

I got help from someone else and people keep saying b or c

Answer 11

did you attempt the calculations?

Answer 12

and d is 40 right

Answer 13

e? am i doing something wrong I would multiply 40 by 1 and 1/2 right

Answer 14

20/.5

Answer 15

20? you may have messed up somewhere

just start by finding d(1) - d(1/2)

Answer 16

I multiplied 40 as d by 1 and 1/2 and subtracted

Answer 17

why multiply 40 by d? 40 is a constant

Answer 18

anyway, start by finding d(1) by plugging in 1 into the function

Answer 19

I thought d = 40 and okay

Answer 20

remember, you cannot just ignore the -16t^2 part

Answer 21

so what do you get when you let t = 1 and calculate d(1)?

Answer 22

-16

Answer 23

-16(1)^2

Answer 24

good, keep going, don't forget about the + 40 at the end

Answer 25

24

Answer 26

good, now repeat the process w/ t = 1/2

Answer 27

so 16(1/2)^2+40?

Answer 28

then do y/x i think ?

Answer 29

oops messed up the direction

yes so 16(1/2)^2+40 = 44

now plugging that into the rate of change formula gives

(24-44)/(1/2) = ?

Answer 30

so -40 I was close just not right direction

Answer 31

yeah sorry i'm way to tired to think straight >>

Answer 32

lol

Answer 33

is 2 b?

Answer 34

oh wait no, for #1 you calculated 16(1/2)^2+40 instead of -16t^2 + 40

Answer 35

plugging in t = 1/2 gives 36 not not 44

so (24 - 36)/(1/2) = -24

Answer 36

and so it is b lol

Answer 37

yeah

Answer 38

anyway for the bacteria question I don't remember how to solve using calculus but you would just find the slope between the two points

Answer 39

2 is d my bad

Answer 40

3 and 4 b?

Answer 41

hm not quite on #2

the slope should be the slope between (2, 2^2) and (5, 2^5)

Answer 42

so (2^5 - 2^2)/(5-2)

Answer 43

32-4=28
28/3

Answer 44

9 1/3

Answer 45

yeah so 9 1/3 which is E

Answer 46

3 and 4 b?

Answer 47

3 is B

haven't checked 4 yet

Answer 48

anyway for #4 I believe your original solution was correct

f(-1) = 2
f(2) = -7

therefore rate of change = (-7 - 2)/3 which is -3 (A)

Answer 49

so my original answer was right what I clicked

Answer 50

anyway that's my opinion

would recommend getting a second person b/c I'm about to collapse

Answer 51

ok